CN112448491A - Stator core, stator structure, motor, compressor and electric appliance with same - Google Patents
Stator core, stator structure, motor, compressor and electric appliance with same Download PDFInfo
- Publication number
- CN112448491A CN112448491A CN202011209305.5A CN202011209305A CN112448491A CN 112448491 A CN112448491 A CN 112448491A CN 202011209305 A CN202011209305 A CN 202011209305A CN 112448491 A CN112448491 A CN 112448491A
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- Prior art keywords
- tooth
- stator
- motor
- shoe
- stator core
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
- H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
- H02K29/03—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The application provides a stator core, a stator structure, a motor, a compressor and an electric appliance with the same, which comprise a core body; the iron core body is formed by overlapping a first punching sheet and a second punching sheet; the first punching sheet comprises a first yoke part and a first tooth part; the first yoke is connected with the first tooth part; the first tooth part comprises a first stator tooth and a second stator tooth; the first stator tooth includes a first tooth shoe and a second tooth shoe; the distance between the surface of the first tooth shoe part far away from the first yoke part and the central axis of the iron core body is R1; the distance between the surface of the second tooth shoe part far away from the first yoke part and the central axis of the iron core body is R2; wherein R1> R2. According to the stator core, the stator structure, the motor, the compressor and the electric appliance with the motor, the problem of noise and vibration of the permanent magnet synchronous motor can be solved; the electromagnetic noise of the motor in the operation process is mainly solved.
Description
Technical Field
The application belongs to the technical field of air conditioners, and particularly relates to a stator core, a stator structure, a motor, a compressor and an electric appliance with the same.
Background
At present, the permanent magnet synchronous motor is widely used in the industry because of the advantages of small volume, simple structure and the like.
However, the existing permanent magnet synchronous electrode is the same as the traditional motor and has the problem of noise vibration, particularly, the motor in the field of compressors is usually connected with a crankshaft structure, the crankshaft is eccentric, and the eccentricity exists, so that the motor forms non-sinusoidal air gap magnetic density, and the motor generates larger electromagnetic vibration and electromagnetic noise, thereby not only influencing the service life of the motor, but also bringing great trouble to the noise requirement in the field with strict noise requirements in some special working environments.
Therefore, how to provide a stator core, a stator structure, a motor and a compressor capable of improving the noise and vibration problem of the permanent magnet synchronous motor, and an electric appliance with the motor and the compressor become problems to be solved urgently by those skilled in the art.
Disclosure of Invention
Therefore, the technical problem to be solved by the application is to provide a stator core, a stator structure, a motor, a compressor and an electric appliance with the same, which can improve the noise and vibration problem of a permanent magnet synchronous motor.
In order to solve the above problems, the present application provides a stator core including a core body; the iron core body is formed by overlapping a first punching sheet and a second punching sheet; the first punching sheet comprises a first yoke part and a first tooth part; the first yoke is connected with the first tooth part; the first tooth part comprises a first stator tooth and a second stator tooth; the first stator tooth includes a first tooth shoe and a second tooth shoe; the distance between the surface of the first tooth shoe part far away from the first yoke part and the central axis of the iron core body is R1; the distance between the surface of the second tooth shoe part far away from the first yoke part and the central axis of the iron core body is R2; wherein R1> R2.
Preferably, the second punching sheet comprises a second yoke part and a second tooth part; a groove is arranged on the second tooth part.
Preferably, the first stator teeth are uniformly disposed on the first yoke;
and/or R1-R2 with the thickness of 0.5mm or more and 1.5mm or less;
and/or the iron core body is formed by the first punching sheet and the second punching sheet in a staggered and superposed mode.
Preferably, the first tooth shoe is located on a first side of the first stator tooth centerline; the second tooth shoe is located on a second side of the first stator tooth centerline; the first side and the second side are arranged in sequence in the circumferential direction of the core body.
Preferably, the second stator tooth comprises two tooth shoe arrangements; the two tooth shoe structures are symmetrically arranged relative to the central line of the second stator tooth; the number of the first stator teeth is set to be a 1; the number of the second stator teeth is set to a 2; wherein a1 ≧ a 2.
Preferably, the location of the groove corresponds to the location of the second tooth shoe.
Preferably, the minimum distance between the groove and the center line of the second tooth part is b; wherein b is ≧ 0;
and/or the maximum distance between the inside of the groove and the central axis of the stator core is R3; the minimum distance between the second tooth part and the central axis of the stator core is R1; wherein, R3-R1 are more than or equal to 3.8mm and less than or equal to 6 mm.
Preferably, the area of the second tooth part is S on the cross section of the iron core body; the area of the groove is S1; s2 is S-S1, wherein 0.055 is not less than 0.145.
Preferably, the cross section of the groove is any one of rectangular, trapezoidal, and annular.
According to still another aspect of the present application, there is provided a stator structure including a stator core, the stator core being the above-mentioned stator core.
According to yet another aspect of the present application, there is provided an electric machine comprising a stator structure as described above.
According to still another aspect of the present application, there is provided a compressor including a motor, the motor being the above-mentioned motor.
According to still another aspect of the present application, there is provided an electric appliance including a compressor, the compressor being the above-mentioned compressor.
According to the stator core, the stator structure, the motor, the compressor and the electric appliance with the motor, the first stamped sheet and the second stamped sheet are stacked to form the core body, and the structure can improve the radial electromagnetic force of the motor, weaken the amplitude of the radial electromagnetic force and reduce the electromagnetic vibration and noise of the motor in the motor operation process; the problem of noise vibration of the permanent magnet synchronous motor can be solved; the electromagnetic noise of the motor in the operation process is mainly solved.
Drawings
Fig. 1 is a schematic structural diagram of a first stamped sheet according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a second stamped sheet according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a core body according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a core body according to an embodiment of the present application;
FIG. 5 is an enlarged view taken at A in FIG. 4;
fig. 6 is a schematic structural diagram of a first stamped sheet according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of a second stamped sheet according to an embodiment of the present application;
fig. 8 is a schematic structural diagram of a first stamped sheet according to an embodiment of the present application;
fig. 9 is a schematic structural diagram of a first stamped sheet according to an embodiment of the present application;
fig. 10 is a schematic structural diagram of a second stamped sheet according to an embodiment of the present application;
fig. 11 is a schematic structural diagram of a second punching sheet according to an embodiment of the present application.
The reference numerals are represented as:
1. a first punching sheet; 11. a first yoke; 12. a first tooth portion; 121. a first stator tooth; 1211. a first tooth shoe portion; 1212. a second tooth shoe; 122. a second stator tooth; 2. a second punching sheet; 21. a second yoke; 22. a second tooth portion; 23. a groove; 3. an iron core body.
Detailed Description
Referring to fig. 1 and 3-5 in combination, according to an embodiment of the present application, a stator core includes a core body 3; the iron core body 3 is formed by overlapping a first punching sheet 1 and a second punching sheet 2; the first punching sheet 1 comprises a first yoke part 11 and a first tooth part 12; the first yoke 11 is connected to the first tooth 12; the first tooth portion 12 includes a first stator tooth 121 and a second stator tooth 122; the first stator tooth 121 includes a first tooth shoe 1211 and a second tooth shoe 1212; the distance between the surface of the first tooth shoe 1211 facing away from the first yoke portion 11 and the central axis of the core body 3 is R1; the distance between the surface of the second tooth shoe 1212 remote from the first yoke portion 11 and the central axis of the core body 3 is R2; wherein R1> R2. The first tooth shoe 1211 and the second tooth shoe 1212 are respectively located on both sides of a center line of the first stator tooth 121, the center line of the first stator tooth 121 extending in a radial direction of the core body 3; the first tooth shoe 1211 and the second tooth shoe 1212 of the first stator tooth 121 have different lengths in the radial direction, i.e., on the first stator tooth 121, the first tooth shoe 1211 is a long tooth shoe and the second tooth shoe 1212 is a short tooth shoe. The iron core body 3 formed by overlapping the first punching sheet 1 and the second punching sheet 2 can improve the radial electromagnetic force of the motor, weaken the amplitude of the radial electromagnetic force and reduce the electromagnetic vibration and noise of the motor in the motor operation process; the problem of noise vibration of the permanent magnet synchronous motor can be solved; the electromagnetic noise of the motor in the operation process is mainly solved.
Referring to fig. 2 in combination, the present application also discloses embodiments where the second stamped sheet 2 includes a second yoke portion 21 and a second tooth portion 22; the second tooth part 22 is provided with a groove 23; the groove 23 can effectively inhibit the magnetic flux leakage of the tooth tip of the stator, improve the utilization rate of main magnetic flux of the motor and improve the performance of the motor, the two punching sheets in the scheme are combined, an uneven air gap structure is formed between the stator and the rotor, the waveform of an air gap magnetic field can be improved, the content of tooth harmonic waves is reduced, the torque pulsation of the motor is reduced, the tooth space torque of the motor is reduced, and the vibration and the electromagnetic noise of the motor are reduced. The stator teeth can be stressed uniformly by matching the long tooth shoes and the short tooth shoes with the grooves 23, the probability of uneven stress of the stator teeth is reduced, and the vibration noise of the motor can be effectively reduced on the whole. Meanwhile, the first tooth shoe 1211 and the second stator tooth 122 of the first stator tooth 121 and the second tooth 22 are the same in length in the radial direction; are both R1.
Referring collectively to fig. 6, the present application further discloses embodiments wherein the first stator teeth 121 are uniformly disposed on the first yoke 11;
and/or R1-R2 with the thickness of 0.5mm or more and 1.5mm or less;
and/or the iron core body 3 is formed by overlapping the first punching sheet 1 and the second punching sheet 2 in a staggered manner.
The present application also discloses embodiments in which the first tooth shoe 1211 is located on a first side of a centerline of the first stator tooth 121; the second tooth shoe 1212 is located on a second side of the centerline of the first stator tooth 121; in the circumferential direction of the core body 3, a first side and a second side are arranged in sequence; the positions of the long tooth shoes and the short tooth shoes are set according to different rotation directions of the motor rotor; in the rotating direction of the motor, the long tooth boots and the short tooth boots are sequentially arranged, and the short tooth boots are arranged at the downstream of the long tooth boots; taking the most middle tooth at the top of fig. 1 as an example, when the motor rotates clockwise, the short tooth shoe of the tooth is positioned at the right side of the long tooth shoe; when the motor rotates anticlockwise, the short tooth shoes on the teeth at the middle of the upper portion of the figure 1 are arranged on the left side of the long tooth shoes, the short tooth shoes are uniformly distributed on the stator punching sheet, and the short tooth shoes are arranged on at least more than half of the stator teeth on one stator punching sheet.
The present application also discloses embodiments in which the second stator teeth 122 comprise two tooth shoe structures; the two tooth shoe structures are symmetrically arranged with respect to the centre line of the second stator tooth 122; the number of the first stator teeth 121 is set to a 1; the number of the second stator teeth 122 is set to a 2; wherein a1 ≧ a 2.
The present application also discloses embodiments in which the location of the groove 23 corresponds to the location of the second tooth shoe 1212; at least one groove 23 is formed in each second tooth portion 22, after the second punching sheet 2 and the first punching sheet 1 are overlapped, the groove 23 is arranged on the short tooth shoe side, and namely the groove 23 corresponds to the short tooth shoe structure. The notch 23 opens in the circumferential direction of the core body 3, i.e., the notch 23 opens on the side surface of the second tooth portion 22.
The application also discloses embodiments, wherein the minimum distance between the groove 23 and the central line of the second tooth part 22 is b; wherein b is ≧ 0; i.e. where the groove 23 is located, the groove 23 cannot laterally exceed the centre line of the second tooth 22; the centerline extends in a radial direction.
And/or the maximum distance between the inside of the groove 23 and the central axis of the stator core is R3; the minimum distance between the second tooth portion 22 and the central axis of the stator core is R1; wherein, R3-R1 are more than or equal to 3.8mm and less than or equal to 6 mm; i.e. the surface in the groove 23 remote from the centre axis, has a radius R3 of the circle circumscribed.
Referring to fig. 7 in combination, the present application also discloses embodiments where, in the cross section of the core body 3, the area of the second tooth portion 22 is S; the area of the groove 23 is S1; s2 is S-S1, wherein 0.055 is not less than 0.145; one or more grooves 23 may be provided on each second tooth 22, and the total area of all the grooves 23 on each second tooth 22 is S1; the second tooth portion 22 has an area S2 excluding the groove 23.
Referring to fig. 8-11 in combination, the present application also discloses embodiments wherein the groove 23 has a cross-section that is any one of rectangular, trapezoidal, and circular. Referring to fig. 9 in combination, 6 first stator teeth 121 are provided with a short tooth shoe structure, and then, 6 second tooth portions 22 of the second punching sheet 2 corresponding to the short tooth shoe structure are also provided with grooves 23, the cross-sectional shapes of the grooves 23 include a rectangle, a trapezoid, an annular shape, and the like, and the grooves can be designed specifically according to requirements.
According to the embodiment of the application, a stator structure is provided, which comprises a stator core, wherein the stator core is the stator core.
According to an embodiment of the present application, there is provided a motor including a stator structure, where the stator structure is the above-mentioned stator structure. The motor is a permanent magnet synchronous motor.
According to an embodiment of the application, a compressor is provided, which comprises a motor, wherein the motor is the motor.
According to an embodiment of the application, an electric appliance is provided, which comprises a compressor, wherein the compressor is the compressor.
It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.
The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.
Claims (13)
1. A stator core, characterized by comprising a core body (3); the iron core body (3) is formed by overlapping a first punching sheet (1) and a second punching sheet (2); the first punching sheet (1) comprises a first yoke part (11) and a first tooth part (12); the first yoke (11) is connected to the first tooth (12); the first tooth portion (12) comprises a first stator tooth (121) and a second stator tooth (122); the first stator tooth (121) comprising a first tooth shoe (1211) and a second tooth shoe (1212); the distance between the surface of the first tooth shoe (1211) away from the first yoke part (11) and the central axis of the iron core body (3) is R1; the distance between the surface of the second tooth shoe portion (1212) away from the first yoke portion (11) and the central axis of the iron core body (3) is R2; wherein R1> R2.
2. The stator core according to claim 1, characterized in that the second punching sheet (2) comprises a second yoke portion (21) and a second tooth portion (22); the second tooth part (22) is provided with a groove (23).
3. The stator core according to claim 1, characterized in that the first stator teeth (121) are uniformly arranged on the first yoke portion (11);
and/or R1-R2 with the thickness of 0.5mm or more and 1.5mm or less;
and/or the iron core body (3) is formed by the first punching sheet (1) and the second punching sheet (2) in a staggered and superposed mode.
4. The stator core according to claim 1, characterized in that the first tooth shoe (1211) is located on a first side of a center line of the first stator tooth (121); the second tooth shoe (1212) is located on a second side of the first stator tooth (121) centerline; the first side and the second side are arranged in sequence in the circumferential direction of the iron core body (3).
5. The stator core according to claim 1, wherein the second stator teeth (122) comprise two tooth shoe structures; the two tooth shoe structures are symmetrically arranged relative to the center line of the second stator tooth (122); the number of the first stator teeth (121) is set to a 1; the number of the second stator teeth (122) is set to a 2; wherein a1 ≧ a 2.
6. The stator core according to claim 2, characterized in that the position of the groove (23) corresponds to the position of the second tooth shoe (1212).
7. The stator core according to claim 2, characterized in that the minimum distance between the slot (23) and the centre line of the second tooth (22) is b; wherein b is ≧ 0;
and/or the maximum distance between the inside of the groove (23) and the central axis of the stator core is R3; a minimum distance between the second tooth portion (22) and the stator core central axis is R1; wherein, R3-R1 are more than or equal to 3.8mm and less than or equal to 6 mm.
8. The stator core according to claim 2, wherein, in a cross section of the core body (3), an area of the second tooth portion (22) is S; the area of the groove (23) is S1; s2 is S-S1, wherein 0.055 is not less than 0.145.
9. The stator core according to claim 2, wherein the cross-section of the groove (23) is any one of rectangular, trapezoidal, and annular.
10. A stator structure comprising a stator core, characterized in that the stator core is a stator core according to any one of claims 1-9.
11. An electrical machine comprising a stator structure, characterized in that the stator structure is a stator structure according to claim 10.
12. A compressor comprising an electric motor, wherein the electric motor is the electric motor of claim 11.
13. An electrical appliance comprising a compressor, wherein the compressor is the compressor of claim 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011209305.5A CN112448491A (en) | 2020-11-03 | 2020-11-03 | Stator core, stator structure, motor, compressor and electric appliance with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011209305.5A CN112448491A (en) | 2020-11-03 | 2020-11-03 | Stator core, stator structure, motor, compressor and electric appliance with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112448491A true CN112448491A (en) | 2021-03-05 |
Family
ID=74736187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011209305.5A Pending CN112448491A (en) | 2020-11-03 | 2020-11-03 | Stator core, stator structure, motor, compressor and electric appliance with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112448491A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11496015B2 (en) * | 2019-06-03 | 2022-11-08 | GM Global Technology Operations LLC | Electric machine with stator tooth tip profile for reducing winding-based power losses |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101771320A (en) * | 2010-02-10 | 2010-07-07 | 无锡东南车辆科技有限公司 | DC brushless electric machine for photovoltaic water pump |
| CN108512320A (en) * | 2018-05-30 | 2018-09-07 | 广东威灵电机制造有限公司 | Stator core and electric rotating machine |
| CN108683276A (en) * | 2018-05-30 | 2018-10-19 | 广东威灵电机制造有限公司 | Stator core and electric rotating machine |
| CN110034616A (en) * | 2019-04-19 | 2019-07-19 | 哈尔滨理工大学 | A kind of magneto-electric coupled damping noise reduction switched reluctance machines structure |
-
2020
- 2020-11-03 CN CN202011209305.5A patent/CN112448491A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101771320A (en) * | 2010-02-10 | 2010-07-07 | 无锡东南车辆科技有限公司 | DC brushless electric machine for photovoltaic water pump |
| CN108512320A (en) * | 2018-05-30 | 2018-09-07 | 广东威灵电机制造有限公司 | Stator core and electric rotating machine |
| CN108683276A (en) * | 2018-05-30 | 2018-10-19 | 广东威灵电机制造有限公司 | Stator core and electric rotating machine |
| CN110034616A (en) * | 2019-04-19 | 2019-07-19 | 哈尔滨理工大学 | A kind of magneto-electric coupled damping noise reduction switched reluctance machines structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11496015B2 (en) * | 2019-06-03 | 2022-11-08 | GM Global Technology Operations LLC | Electric machine with stator tooth tip profile for reducing winding-based power losses |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210305 |
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| RJ01 | Rejection of invention patent application after publication |